Re: [Boost-bugs] [Boost C++ Libraries] #3264: open config file

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #3264: open config file
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-11-02 08:56:39

#3264: open config file
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 Reporter:  Diederick C. Niehorster <dcnieho@…>          |       Owner:  vladimir_prus  
     Type:  Feature Requests                             |      Status:  new            
Milestone:  Boost 1.40.0                                 |   Component:  program_options
  Version:  Boost 1.39.0                                 |    Severity:  Optimization   
 Keywords:                                               |  
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Changes (by s.ochsenknecht@…):

 * cc: s.ochsenknecht@… (added)

Comment:

 I see one problem here. How to determine if a ifstream or a wifstream
 should be used? Both take (const char*) as type for the file name.

 One Solution could be:
 We can implement a template with a basic_string<char> and
 basic_string<wchar_t> instantiation for the file name. So, if the file
 name comes with a basic_string<wchar_t> then we use wifstream, the file
 name has to be converted to (const char* ).
 {{{
 template<charT>
 parse_config_file(const std::basic_string<charT>&, ...);
 }}}


 Another solution could be:
 The function takes const char* parameter for file name which is directly
 passed to ifstream/wifstream:
 {{{
 template<charT>
 parse_config_file(const char*, ...);
 }}}
 But how the user can choose now between ifstream and wifstream?

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3264#comment:2>
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